Skip to content
NewMastershot Studio is open: a video editor with no watermark on anything you export. Try it free

Change DPI

Change the DPI of an image for free, such as to 300 DPI for printing, without changing a pixel. Each file's current DPI is shown, and nothing is uploaded.

Files stay on your device

Drop images to set them to 300 DPI

Add one or as many as you like. Each file's current DPI is shown, and nothing is uploaded.

PNG, JPG, WebP, HEIC, AVIF, SVG, BMP, and GIF. As many as you like, or a whole folder.

New DPI
Only the DPI written in the file changes. Every pixel stays as it was, so the picture looks the same on screen.
DPI

300 is the usual for printing photos, and 72 or 96 for screens.

How to change the DPI of an image

Add JPG or PNG pictures, pick a DPI such as 300 or 72, or type one, and download them. Only the DPI written in the file changes, so the picture is exactly the same, and you can see each file's old DPI and the size it prints at. It's what forms and print shops mean when they ask for a 300 DPI image. HEIC and other photos are saved as JPG first.

  1. Step 1

    Add your images
    JPG or PNG, one or many.

  2. Step 2

    Pick the DPI
    300 for print, 72 or 96 for screens, or type one.

  3. Step 3

    Download them
    The same pixels, with the new DPI.

What to expect

Supported inputs
JPG and PNG files keep every pixel. HEIC and AVIF photos are saved as JPG, and WebP, GIF, BMP, ICO, and SVG pictures as PNG.
What happens
A JPG's JFIF header and EXIF resolution, or a PNG's pHYs chunk, are set to the new DPI. The pixels and the file's quality are untouched.
Limits
DPI doesn't add detail: a small picture at 300 DPI just prints small. To print at a size in cm or inches, resize it to that size at 300 DPI.

Private by design

Your images stay on your device

Mastershot processes your file locally in this browser. It does not need to be uploaded to a server, and you do not need an account to use the tool.

  • No upload
  • No signup
  • No watermark

Questions

Add it here, keep 300, and download it. The file then says 300 DPI, and its print size is shown in cm and inches.

No. Only the DPI note in the file changes; every pixel stays as it was.

Add it here: each file's current DPI is shown on its row. No DPI means the file doesn't say, which most apps show as 72 or 96.

No. DPI only sets how big it prints. For a sharper print, start from a picture with more pixels.

Related tools